Review - Velocity, Circular Motion
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Circular Motion Rutgers U. Videos |
A. Equations & Vectors
Review
Why is an object moving at constant
speed
in a circle considered to be accelerating?
Because while its speed is not changing, its direction is.
1. Centripetal Acceleration (ac) - acceleration toward center of curvature
| a) Equation: | ac = | V2 |
| r |
r - radius, V - velocity
b) (V) Instantaneous Velocity - tangent to circle, in the direction of the motion
c) Centripetal Force (Fc) - force directed toward the center of the circle
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Ex) A car moving in a circular path with a radius of 2.0 m has a velocity of 8.0 m/s. What is the centripetal acceleration of this car? |
Ex) A car moving in a circular path with a radius of 2.0 m has a velocity of 8.0 m/s. What is the centripetal acceleration of this car?
| ac = | V2 |
| r |
| ac = | (8.0 m/s)2 |
|
2.0 m |
ac = 64/2
ac = 32. m/s2
ŠTony Mangiacapre.,
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